The design of the Chill Out uses Valandre's high tech tubular construction assembled using pre-cut anatomical baffles, a well proven technology from Valandre's goose down expedition sleeping bag line.Comfort Rating: 13° F; Limit of Comfort 0° F, Extreme: -40° FCarry Weight: 45 oz./1280g (sm), 47 oz./1350g (md), 51 oz./1450g (lg)Size: 38.2" x 66.9" (sm), 39.8" x 72.8" (md), 43.7" x 78.7" (lg)Carry Size: 11 LFill: Duck DownFill Weight: 28 oz./811g (sm), 29 oz./850g (md), 31 oz./889g (lg)Shell: Asahi-Kasei 1.1oz Nylon 6.6 Rip-Stop - DWRLiner: Asahi-Kasei anti-static Polyester - DWRFits To: 5'6" (sm), 6' (md), 6'6"